Climb the stairs to the mezzanine... Enter through the doors... Go forward to the wide landing... Climb the stairs on either side of the wide landing. Go forward to the balcony at other side.See a door with Nancy's name on it.

Yes, go up the stairs from the double doors. That'll lead out to the wide landing, where there are stairs leading forward on either side of it. Don't turn around to take the landing behind you -- you need to move forward. Take either set of stairs -- they'll both lead you forward to the other side, where you'll come to a door with a large sign on it with Nancy's name.

Sorry to be so dense but I still can't find it. When I go to the wide landing (past the wood floor to the marble) I see stair cases going down on either side but none going up. I can see Nancy's room in front of me but I can't figure out how to get there.